Formaldehyde content is relatively high density board, if there are material of density board in the home, it is recommended to use Maya blue light catalyst or liquid handling.
Surface smoothness, hand touch surface should be smooth feeling, if feeling is acerbity shows processing does not reach the designated position.
Surface roughness, density board surface should be flat light, such as viewed from the side surface is not flat, then there is something wrong with the material or coating process.
Surface cleanliness: surface cleanliness good density board surface should be no obvious particles. Particles is pressed into the impurities in the process of cause, not only affect beautiful, and make the film easy to peeling off.